http://www.redmine.org/ Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database.
Aptana Studio is a complete web development environment that combines powerful authoring tools for HTML, CSS, and JavaScript, along with thousands of additional plugins created by the community.
Code::Blocks - The IDE with all the features you need, having a consistent look, feel and operation across platforms.
NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers.
IzPack is a one-stop solution for packaging, distributing and deploying applications. IzPack-generated installers only require a Java virtual machine to run.
JasperReports is an open source embedded operational reporting library that is designed to create page-oriented, ready-to-print documents in a simple and flexible manner.